Milwaukee 5/16"-24 NF Straight Flute Plug Tap is expertly crafted for creating or repairing clean and precise internal threads. This plug tap is precision machined to ensure accuracy and durability, making it i for through-hole threading in a variety of metal materials such as brass, aluminum, and mild steel. It features long-lasting laser-etched sizing for easy identification and a protective Black Oxide coating that provides excellent corrosion resistance. The square shank design fits all standard tap handles or tap wrenches, ing convenience and versatility. For optimal performance, it is to use this plug tap with cutting fluid. Model Number: 49-57-5144